It could be
A) He likes the attention and petting
B) He is getting aggressive
Or
C) I'm not sure what C is...
Your dog' s tail is wagging because he is exited or likes something you did.
The possessive form is: The wet dog's tail is wagging.
It can, but this is more likely when the dog is sitting or lying down. When a dog is standing and wagging its tail, it's the momentum of the tail wagging that spreads to the rest of the dog's body and causes the rest of the dog to wag too.
wagging
Wagging
Yes, dogs growl when they are playing. But attention should be paid to the dog's body language. Usually, if they are wagging their tails, they are just playing around.
Its depressed. It wants to be a proper dog.
Ears will be up and tail will be wagging
The farrow hound dog
The Wagging Tail
Imo oten
The dog rules with an iron fist (paw?), so have to say no.